William a



(No Model.)

W A. KONEMAN.

METHOD OF BURNING 'coAL SL'AGK. No. 469,859. Patented Mar. 1,1892.-

NITE'D STATES PATENT 'F IVILLIAM A. KONEMAN, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE CHICAGO HEAT STORAGE COMPANY, OF SAME PLACE.

METHOD OF BURN|NG 'COAL-SLACK.

SPECIFICATION forming part of Letters Patent No. 469,859, dated March 1, 1892.

Application filed March 3, 1891, Serial No. 383,595. (No specimens.)

To all whom it may concern.- cluding lime-rock, suitable proportions being Be it known that I, \VILLIAM A. KQNEMAN, about twenty pounds of the fragmentary a citizen of the United States, residing at Chibrick to one hundred and fifty pounds of the cago, in the county of Cook and State of Illicoal. By thus mixing with the fine coal the 5 nois, have invented anew and useful Improvefragmentary refractory material the latter is ment in Methods of Burning Coal-Slack, of distributed through the bed of fuel and mainwhich the following is a specification. tains the desired porosity thereof by prevent- A difficulty hitherto encountered in the use ing the fine coal from caking, and, as will be of coal-slack or mine refuse for manufacturnoticed by inspecting the drawing, the accu- IO iug purposes, as for heating and gas producmulation of the material 19 becomes more and tion, and which has tended to prevent the use more dense toward the bottom of the bed of this cheap form of fuel, has been that it where it is thickest, sinking thereto by gravpacks or cakes in the fuel-chamber, and thus ity, and practically forms an interstitial pile obstructs the passage through the fuel-bed of of refractory material, affording-a storage for r 5 the necessary combustion-inducing oxygen, the generated heat, of combustion, tending and necessitates frequent manipulation to the more to promote combustion of the genbreak up the mass, which is impracticable erated gases. and otherwise objectionable. If the material p be, as it may, lime-rook,

My object is to prevent such caking of it should be used in a sufficiently-large pro- 2o finely-divided solid fuel by maintaining the portion to avoid the formation of a slag with bed thereof sufficiently porous to permit the ash from the coal, and then air only ready passage through it of the air-supply, should be introduced from under the fuel-bed thereby rendering this cheap form of fuel as into the fire-chamber. convenient for use as the more expensive The advantage of using lime-rock for my 25 forms of coal. To this end I burn the fuel purpose is that its residuumisacommerciallymixed with a suitable proportion of refractory valuable product-namely, quicklime; bematerial in a fragmentary state. sides, it yields about twelve pounds of carbon My further object is to provide for the savto each hundred pounds of lime-rock, which ing, for repeated similar or other use, of the assists in generatingafirst-class producer-gas. o fragmentary refractory materialemployedfor To remove the fire-brick for repeated use maintaining the desired porous condition of or the quicklime for commercial use from the the bed of fuel. base of the bed of fuel without interrupting To illustrate my improvement, I show in or interfering with the operation of the appathe accompanying drawing by a View in sectus, (whether it be the producer shown or any 3 5 tional elevation a fuel-gas producer. form of heater,) I provide in the back of the A is the shell of the producer, containing fire-chamber a ledge 02, located the desired the grate 4", below which enters the air or air distance above the grate and forming a rest and steam supply pipe (1. for the inner ends of bars 1%, which are in- B- is the hopper device at the upper end of serted and removable through an opening or 40 the shell, flanked by the steam-pipes 0, for inopenings Z in the front of the apparatus above jecting steam upon the bed of fuel to entail the fuel-chamber door (1, and which is only the coating of its surface with an ash for rewide enough vertically to admit ready inserducing the temperature thereof and preventtion and removal of the false-grate bars, and ing loss by distillation of hydrocarbon vapors is to be closed by suitably plugging it after 5 5 from the fresh deposits of coal from the hopthe bars have been withdrawn. w per; and C is the outlet. The false grate is to be adjusted in place The fuel employed is coal-slack or mine with the opposite ends of the bars m resting, refuse, which, prior to its introduction into respectively, on the ledge n and opening Z the combustion-chamber, as by dumping it when the mixture of accumulated ashes and 50 into the hopper, I mix with broken pieces of fragmentary material 19 require to be raked fire-brick p or other. refractory material, inout, after which the bars are withdrawn and the fuel above them and material 1), mixed with it, sink down upon the grate a. From the matter thus raked out the fragmentary material is separated and again used if it be such as fire-brick, or is saved for commercial disposition if it be quicklime.

What I claim as new, and desire to secure by Letters Patent, is

1. The method of facilitating the burning of coal-slack or mine refuse, which consists in mixing and burning it with a suitable proportion of fragmentary refractory material 19 and passing air through the mixture to promote the combustion, substantially as described.

WILLIAM A. KONEMAN.

In presence of- J. W. DYRENFORTH, M. J. FRosT. 

